The sun never sets on Brompton tourists.
There are several Facebook groups dedicated to that exact subject, plus countless YouTube videos and Blogs and even a company web page:
https://www.brompton.com/news/posts?category=Stories
Saw one guy going around the world with some small, lightweight bikepacking bags (and a credit card!). Folks like Heinz Stücke pack everything they own. Then there's a dedicated trailer: